As we sipped tea in his office after our tour, we chatted about why the United States was then mired in production difficulties, unable to make much of the personal protective equipment that people wanted. “American manufacturers constantly asked themselves whether making masks and cotton swabs was part of their ‘core competence.’ Most of them decided not.” He put down his teacup and looked at me. “Chinese companies decided that making money is their core competence, therefore they go and make masks, or whatever else the market needs.

Mostly, though, I think the problem lies with American policymakers and executives who fail to grasp the importance of process knowledge.

American manufacturers spent the better part of three decades unwinding its stock of process knowledge when it opened so many factories in China. Every US factory closure represents a likely permanent loss of production skill and knowledge. Line workers, machinists, and product designers are thrown out of work; then their suppliers and technical advisers struggle as well. Entire American communities of engineering practice have dissolved, leaving behind a region known as the Rust Belt. Some mayors and governors tried to stem this receding tide. But they were continuously scorned by economists and executives, who sought low-wage production in the name of globalization. Still today, many American economists doubt there is anything special about manufacturing and put their faith in the inevitable march to a service economy.

It’s hard, I admit, to draw a straight line between the loss of, for example, television manufacturing in the United States through the 1980s to the stumbles by Boeing and Intel over the past decade. But if we think about technology ecosystems as communities of engineering practice, it makes sense that factory closures accelerated as process knowledge dissolved, prompting production problems and more job losses. And it also makes sense that Chinese workers went from merely assembling iPhones to producing a some of their most valuable components as well.

Everything starts from the recognition that something has gone quite wrong in US technology. Too many people have argued away the strategic importance of manufacturing. And the solution has to involve reconstituting its communities of engineering practice that prioritize process knowledge. It means attempting to build up every segment of manufacturing: training workers and creating incentives for manufacturers in order to relearn mass production.

This scenario sounds a bit fantastic, but if the iPhone were built in the United States rather than Shenzhen, then an American city— say Detroit, Cleveland, or Pittsburgh— might be hailed as the hardware capital of the world.

The United States must regain, at a minimum, the manufacturing capacity to scale up production that emerges from its own industrial labs. If it does not, continuing to value scientific breakthroughs rather than mass manufacturing, then it might lose whole industries once more— as it did by inventing the solar photovoltaic panel but relying on China to produce them. The United States likes to celebrate the light-bulb moment of genius innovators. But there is, I submit, more glory in having big firms making a product rather than a science lab claiming its invention.